Converting a G3 into an aircraft carrier

Could a G3 battlecruiser be converted into a 40,000-ton aircraft carrier?

Yes; the conversion is straightforward, and the potential result is comparable with Lexington and Saratoga.

The G3 hull offers enough displacement for a substantial fleet carrier rather than a compromised small conversion. A capable result could be achieved at about 40,000 tons. The comparison with Lexington and Saratoga gives the counterfactual a concrete scale.