Bhai Sahib, there is a mention of Muhammed in Bachitar Natak
ਮਹਾਦੀਨ ਤਬ ਪ੍ਰਭ ਉਪਰਾਜਾ ॥ ਅਰਬ ਦੇਸ ਕੋ ਕੀਨੋ ਰਾਜਾ ॥੨੬॥
Then I created Muhammed, who was made the master of Arabia.26.
ਤਿਨ ਭੀ ਏਕ ਪੰਥ ਉਪਰਾਜਾ ॥ ਲਿੰਗ ਬਿਨਾ ਕੀਨੇ ਸਭ ਰਾਜਾ ॥
He started a religion and circumcised all the kings.
ਸਭ ਤੇ ਅਪਨਾ ਨਾਮੁ ਜਪਾਯੋ ॥ ਸਤਿ ਨਾਮੁ ਕਾਹੂੰ ਨ ਦ੍ਰਿੜਾਯੋ ॥੨੭॥
He caused all to utter his name and did not give True Name of the Lord with firmness to anyone.27.
ਸਭ ਅਪਨੀ ਅਪਨੀ ਉਰਝਾਨਾ ॥ ਪਾਰਬ੍ਰਹਮ ਕਾਹੂ ਨ ਪਛਾਨਾ ॥
Everyone placed his own interest first and foremost and did not comprehend the Supreme Brahman.
ਤਪ ਸਾਧਤ ਹਰਿ ਮੋਹਿ ਬੁਲਾਯੋ ॥ ਇਮ ਕਹਿ ਕੈ ਇਹ ਲੋਕ ਪਠਾਯੋ ॥੨੮॥
When I was busy in the austere devotion, the Lord called me and sent me to this world with the following words.28.
As for Jesus, he is mentioned in Bhai Gurdas Ji's Varan a few times, one line I found was the following
goeil vaasaa chaar dhin naao dhharaaein eesae moosae||
May be some one has named himself after Christ or Moses, but in this world all are to stay for a few days.
Reading into Jesus' life there are a lot of good life lessons to learn, he was very humble and was a revolutionary of his time. However, like Bhai Sahib has mentioned above, highest stage he could have reached is Dharam Khand, or Gyan Khand. Listening to many peoples testinomny of meeting Christ, from the near death experiences I have read, it seems like they always give a heavenly description. Christians are also very adament that Heaven is the highest stage one can reach when they die, so we can guess that Jesus resides in Dharam Khand. Or, Dass always wondered if there were any high avastha Gurmukhs who could attest to being Jesus in their past life, since he lived such a pious life he could have been reborn as a Sikh? ahha that would be really interesting
An interest sakhi you could tell was one relating to Baba Harnam Singhs book. In one of the chapters Baba Ji relates his story of getting Darshan, of Jesus Mohamed and another Hindu God of some sort that I forget. They told Baba Ji that there is no path greater then the one laid out by Guru Nanak Dev Sahib Ji and they wished that all their followers could follow Guru Jis path instead of their own. You can find this chapter of his book online somewhere.
Wow all this talk about worldy prophets had made me appreciate, so many people follow the paths of these worldy prophets thinking that they will bring mukhti, when Gursikhs no that there is only one path to salvation, which is through Guru Sahib. Just to know about the only true Satguru, Guru Granth Sahib Ji how lucky we must be! To have taken Amrit and gotten Naam from Guru Sahib, this must be the equivlent to winning a million lotteries over and over! We truly are lucky!
VAHEGUROOOOO time to get darshan!