It sounds like you're asking about google web sites, not apps. Apps are stand-along applications that you install on your BB - hence don't use a browser or web sites.
gmail and google maps have stand-alone applications that display just fine and work well. Here's the central download page for all of google's mobile apps: Google Mobile
Otherwise it sounds like your issue is with browser emulation... which I'm not too familiar with. Maybe you're emulating full-blown IE? Most google sites will automatically adjust to a mobile layout... and some have the option to switch back and forth. Cookies enabled to remember your preferences?
You might also try a 3rd party browser like opera or opera mini: http://mini.opera.com