would a copy of a Turn to Frog Gideon survive?does TtF remove the type "Gideon"?
205.1a Some effects set an object’s card type. In such cases, the new card type(s) replaces any existing card types. Counters, effects, and damage marked on the object remain with it, even if they are meaningless to the new card type. Similarly, when an effect sets one or more of an object’s subtypes, the new subtype(s) replaces any existing subtypes from the appropriate set (creature types, land types, artifact types, enchantment types, planeswalker types, or spell types). If an object’s card type is removed, the subtypes correlated with that card type will remain if they are also the subtypes of a card type the object currently has; otherwise, they are also removed for the entire time the object’s card type is removed. Removing an object’s subtype doesn’t affect its card types at all.
9/22/2011 The creature will lose all other colors and creature types, but it will retain any other card types (such as artifact) it may have.
If it keeps the type Planeswalker, it keeps the planeswalker subtype Gideon.
if it keeps the type Planeswalker, it keeps the planeswalker subtype Gideon.