I've never used a gas grill but have baked and roasted on charcoal and/or wood grills. You need a cover for your appliance to control the temperature, a thermometer probe is very useful to gauge temperature and the ability to zone cook which is prolly very easy on a gas grill.
Here's a recipe I translated to charcoal from gas grill to make pizza. No need to follow the ingredient list but the technique is spelt out nicely:
http://saramoulton.com/2011/10/blistered-corn-asparagus-and-pesto-pizza/Once you follow the basics of zoned or direct/indirect heat on a grill, it'll take you to a whole other level of use:).
HTH