The gender of a lad is male.
The word "lad" is a British English term that is typically used to refer to a young man or boy. It is often used in a friendly or informal way.
While "lad" is a term that is typically associated with masculinity, it is important to note that gender identity is complex and can be fluid. There are individuals who identify as male but do not use the term "lad" to describe themselves, and there are individuals who identify as non-binary or female who may use the term "lad" to describe themselves.
Ultimately, the term "lad" is a social construct and its meaning can vary depending on context and individual interpretation.