Any more information I should know about gmrs that you can enlighten me on
As I'm sure you know, using GMRS requires an FCC licenses. It can get confusing, because the FRS radio services uses many of the same frequencies. FRS requires 2 watts or less on most channels (0.5 watts or less on others) and non-removable antennas.
That really limits what you can do.
With a valid FCC issued GMRS license you can run 50 watts on the primary GMRS channels and repeater inputs, and 5 watts on the shared FRS channels. GMRS also allows external antennas.
To get the most range from GMRS, you'll need decent commercial quality radios. You won't get good performance out of the consumer grade junk.
Adding a good external antenna on your home and car will make big difference with performance.
I let my GMRS license expire many years ago, but back before others in my family got their amateur licenses, we used GMRS heavily. We had access to a high level repeater that gave us a lot of coverage.
Using simplex (direct radio to radio) in our vehicles, it was not uncommon to get 15 miles of range between them. Using the repeater, I once talked to my dad about 120 miles away.
Good antennas and radios make a big difference in performance. Before spending money on getting your FCC license, have a realistic discussion with yourself about what you -real- budget is. If you are looking at buying a couple of $30 radios, don't waste your time. If you are ready to invest in some real commercial quality UHF mobile and portable radios, then you are on the right track.