How do you synchronize audio with midi ?

Hi. Have you tried to use Audiosnap to correct the guitar?
All the best.

this is a dangerous game.
you should always try to record your drums first, then guitars.
if I were you, I would redo the guitar track.
 
unless of course there is something out of synch, like your buffers, which is causing the issue.
You could try using Autosnap as Ken mentioned. that's really your only choice.
me personally, I would be doing the track over.
 
always start with your drums as a base because it has pieces that are quantized to 1/8 notes, 1/16 notes.
those should always be your starting instrument because of small differences. there of course other times when a guitar part is necessary to lay down first. but I typically use that first guitar track as a "Dummy track".
a guide.

+1 for Set Measure/Beat At Now (Ctrl+M in 8.5.3) if you want to sync the timeline (and thus the MIDI) to the Guitar audio with tempo changes... except for one problem; it did not work properly in that release.   It worked as expected in 8.5.2 and was eventually fixed again in X3.
 
But if you really prefer to stretch the guitar audio to match the quantized drums. You'll need to enable Audiosnap on the guitar track, verify the clip tempo and transient markers are set/detected correctly, and then quantize it.
 
You'll want to check the SONAR Ref. Guide or Help for Audiosnap usage since the leyboard shortcuts and tools for working with Audiosnap have changed significantly since 8.5.3.