NO GMRS for business use.
One could also operate on GMRS and MURS and FRS in an itinerant fashion. Similarly, those are shared, uncoordinated channels and you are likely to encounter many other users there that could adversely effect how well you can communicate.
^^^ this! ^^^
Be sure to understand that you CAN NOT operate on GMRS or the interstitial FRS/GMRS frequencies for your business. The only exception are commercial license holders that have existing licenses in the GMRS band that have re-licensed without any significant modifications since 1987. Anyone from 1987 and later can not license a GMRS frequency for business use, and any individual wanting to use GMRS must obtain an individual FCC GMRS License. You may use an FRS radio (no greater than 1/2 watt and a non removable antenna) on the interstitial FRS/GMRS frequencies without a GMRS license, but again, not for business use.
Personally if you need two way coms for your business, invest in quality commercial radios, and a FCC license for either coordinated Part 90 frequencies, or Part 90 Itinerant frequencies.
If you don't want to spend the money, MURS is also a viable option for personal or business use, but expect to do some frequency sharing, and don't freak out if you hear "Alert Zone 1" from the Dakota Alert wireless driveway sensors, Data Bursts from agricultural and municipal equipment, other businesses, hunters, loggers, families, etc.. Get familiar with PL/DPL.