This is a BF derivative that uses whitespace.
All sequences of whitespace are interpreted as trits (ternary digits) with all other characters ignored/removed. The translation table is below:
WHITESPACE = " \t\n"
TRINARY = "012"
Then, the translated code is padded with 2s to an even length, chunked into sections of 2, and interpreted as BF code by the following table:
"00" => "+",
"01" => "-",
"02" => ">",
"10" => "<",
"11" => ".",
"12" => ",",
"20" => "[",
"21" => "]",
"22" => "G"
Uses a semi-custom BF interpreter in which cells can have infinite values, and there are 1048576 cells.