There is no difference between gern and gerne in meaning, and they are interchangeable in usage. The dictionary typically even lists them as "gern(e)" rather than as separate entries.
The usage between the two is more of a feeling or the way it sounds in the sentence or circumstance rather than a grammatical requirement. Perhaps you want to say "gerne" to really emphasize something, or perhaps just "gern" with a sense of finality. As you become more familiar with German, you will get a better feel for its rhythm and rhyme and what sounds better to your ears. The choice is yours.
Last updated 3 years ago
