Tested and works like that, it is ok?
PHP Code:
arrayset( gLives, 0 , sizeof gLives );
Also you didn't answer if is correct like that ( 35 should be size of a steamid, 33 the array ):
PHP Code:
#define Max_Players 32
new gLives[ Max_Players + 1 ];
new gAuthId[ Max_Players + 1 ][ 35 ];