How to speed update time of IDR Register STM32?

I have a question about the IDR Register of STM32 I set the pin0 of the 
ODR Register to 1 in my code below and i want to check, if the pin0 in 
the IDR register is set to 1. The problem is, after setting the pin to 
1, i musst wait 1 second until the pin in the IDR register is set to 1. 
How can i read the pin state without waiting. How can i handle this 
problem? ''' void init_pins(void) {

GPIOG->OTYPER |= (0x01 << 0); // Pin 0 as open drain
GPIOG->OTYPER &= ~(0x01 << 1); // Pin 1 as push - pull

GPIOG->BSRRL  =  0x01 << 1; // Pin 1 to High
GPIOG->BSRRL  =  0x01 << 0; // Pin 0 to High

microsecond_Delay(1000000);

if( !(GPIOG->IDR & 0x01) )
{
    errorCode = -1 ; //Error Code for Bus not floating
}
} '''