No power no lights has new atanator, gages turn off while in drive, takes a jump

Hello, it still sounds like an electrical power issue while the engine is running. First, ensure you have a known good, fully charged battery in the vehicle. Have the battery tested by a reliable tester -- don't just check for voltage. Once you have a known good battery, alternator output needs to be checked for both voltage and amperage. Even "new" alternators can be faulty! Lastly, wiring to the alternator could be in question, so inspect the wiring and connector closely.