Short answer
Jannah has eight gates, as the Prophet ﷺ said. One is called al-Rayyan, which only those who fasted will enter. Others are linked to deeds, such as the gate of prayer, the gate of jihad and the gate of charity, and some believers will be called from all eight.
Belief in Jannah as described in the Quran and authentic hadith is part of belief in the Last Day. The details of the gates come from sahih hadith and are believed as reported, without adding names that have no source.
The four schools agree on this.
Explanation
The Prophet ﷺ said, "In Paradise there are eight gates. Among them is a gate called al-Rayyan, which only those who fast will enter" (Sahih al-Bukhari). On the Day of Judgement the gates will already be open as the believers arrive, and the keepers will greet them: "Peace be upon you; you have become pure; so enter it to abide eternally" (39:73).
He also said that whoever spends a pair of something in Allah's cause will be called from the gates of Paradise. Whoever was among the people of prayer will be called from the gate of prayer; the people of jihad from the gate of jihad; the people of fasting from al-Rayyan; and the people of charity from the gate of charity. Abu Bakr asked whether anyone would be called from all of them. He said yes, and that he hoped Abu Bakr would be one of them (Sahih al-Bukhari).
A simple deed opens all eight: the Prophet ﷺ said whoever makes wudu well and then says, "I bear witness that there is no god but Allah alone, with no partner, and that Muhammad is His servant and messenger," the eight gates of Paradise are opened for him to enter by whichever he wishes (Sahih Muslim).
Lists online often give the other four gates fixed names. Some scholars mentioned further gates from other reports, but the sahih hadith name only some of them. Hell, by contrast, has seven gates (15:44). Read more about the levels and al-Firdaus in Jannah in Islam.
The evidence
Quran, Surah Az-Zumar 39:73
وَسِيقَ ٱلَّذِينَ ٱتَّقَوْا۟ رَبَّهُمْ إِلَى ٱلْجَنَّةِ زُمَرًا ۖ حَتَّىٰٓ إِذَا جَآءُوهَا وَفُتِحَتْ أَبْوَٰبُهَا وَقَالَ لَهُمْ خَزَنَتُهَا سَلَٰمٌ عَلَيْكُمْ طِبْتُمْ فَٱدْخُلُوهَا خَٰلِدِينَ ﴿٧٣﴾
But those who feared their Lord will be driven to Paradise in groups until, when they reach it while its gates have been opened and its keepers say, "Peace be upon you; you have become pure; so enter it to abide eternally therein," [they will enter].
The gates of Paradise will be open for the believers.
Quran, Surah Al-Hijr 15:44
لَهَا سَبْعَةُ أَبْوَٰبٍۢ لِّكُلِّ بَابٍۢ مِّنْهُمْ جُزْءٌۭ مَّقْسُومٌ ﴿٤٤﴾
It has seven gates; for every gate is of them a portion designated."
Hell has seven gates, Paradise eight.
Sahih al-Bukhari 3257
Sahih... في الجنة ثمانية أبواب فيها باب يسمى الريان ...
"In Paradise there are eight gates; among them is a gate called al-Rayyan."
States the number of gates and names one.
Sahih al-Bukhari 1897
Sahih... من أنفق زوجين في سبيل الله نودي من أبواب الجنة ...
"Whoever spends a pair in Allah's cause will be called from the gates of Paradise."
Links gates to deeds such as prayer, jihad, fasting and charity.
Sahih Muslim 234
Sahih... فتحت له أبواب الجنة الثمانية يدخل من أيها شاء ...
"The eight gates of Paradise are opened for him, to enter by whichever he wishes."
The reward of the shahada after wudu.
Where the ruling is recorded
- al-Aqida al-Tahawiyya, Section on Paradise and Hell. Affirms that Paradise and Hell are created and will never end.
- Sharh Sahih Muslim (al-Nawawi), Kitab al-Zakah, hadith of the gates of Paradise. Explains the gates named after deeds.
Checked by our team. For a more accurate answer to your own situation, consult a scholar. Quran translation by Sahih International. Hadith Arabic from the standard editions of the six books and the Muwatta, with gradings as recorded there; the English is our own rendering. Spotted a mistake? Tell us.