End of Life Ruby 3.2 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

Zlib::GzipWriter#printf

printf(*args)

#define rb_gzwriter_printf  rb_io_printf

Same as IO.

See also #print #putc #pos #puts also in 4.1 · 4.0 · 3.4 · 3.3 · 3.1 · 3.0