Looking on the internet deeply has found these results:

I have to go now is the most popular phrase on the web.

I gatta off now 10 results on the web	I have to go now 165,300 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	3 mar. 2009 ... Clipe do novo sucesso da banda Jammil e Uma Noites, Tchau, I Have To Go Now. O Jammil é presença confirmada no AXÉ 2009, dias 3 e 4 ... (I) have to go now. an expression announcing the need to leave. Fred: Bye, have to go now. Mary: See you later. Take it easy. Sue: Would you help me with this ... Instead, Meyers dubs the correct line Oh not much, just ... Hey guys, what are you up to? "I have to go now. My planet needs me." I have to go now. My planet needs me. What you say when you need to get out of an awkward situation, fast.

I gatta off now

10 results on the web

I have to go now

165,300 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

3 mar. 2009 ... Clipe do novo sucesso da banda Jammil e Uma Noites, Tchau, I Have To Go Now. O Jammil é presença confirmada no AXÉ 2009, dias 3 e 4 ...
(I) have to go now. an expression announcing the need to leave. Fred: Bye, have to go now. Mary: See you later. Take it easy. Sue: Would you help me with this ...
Instead, Meyers dubs the correct line
Oh not much, just ...
Hey guys, what are you up to?
"I have to go now. My planet needs me."
I have to go now. My planet needs me. What you say when you need to get out of an awkward situation, fast.