I would consider either resubmitting as is to PCGS for a regrade or cracking it open and resubmitting. Not many people know ICG and having a PCGS grade should raise the value possibly.
The item "1925 MS62 Double Eagle, $20 Gold St Gaudens ICG MS 62 Free Shipping" is in sale since Thursday, August 6, 2020. This item is in the category "Coins & Paper Money\Coins\ US\Gold (Pre-1933)\$20, Double Eagle". The seller is "islandcap89" and is located in Salem, Oregon.This item can be shipped to United States.