it wont work! for gapps u need to point your mx records to google therefore u cant have your nameserver pointed to another server where u wont be able to use your mx,a, and other records!
to validate your domain for gapps u have several options. but thats really easy. after validation u need to point your mx records to google and if u want to use other products like url shortener or sites ull always need to point those subdomains with an a record to ghs.google.com and for that, like mentioned, u cant have your nameserver poined to sedo...
what u can do: use another parking service.
- you can have your domain at sedo listed for sale.
- you will be able to use gapps.
- you can park it somewhere where u can direct your domain via an a-record.
have fun.