Due to the complete absence of plot details, character information, or thematic context for 'Girlfriend, 1989', it is not possible to assess whether LGBTQ+ characters or themes are present, nor to evaluate their portrayal.

There is insufficient information available regarding the plot, characters, or themes of the film "Girlfriend, 1989" to assess its portrayal of transsexual characters or related themes. Therefore, a determination of its net impact cannot be made at this time.

The movie does not contain any action or adventure elements.

There is insufficient information to determine if a gender swap occurs. No source material or character details are provided to establish a canonical gender baseline for comparison with on-screen portrayals.

The provided details lack information regarding source material, character canon, or cast, making it impossible to determine if any race swaps occurred in "Girlfriend, 1989."