The planned gateway will not invade personal data or violate people's rights to access public information, he said on Thursday.
The project has been widely criticised on social media that it may violate people's basic rights to access public information.
The concept is aimed at creating a new gateway as a main connection point of internet traffic in the country to facilitate the digital economy. The nine existing gateways owned by state enterprises and private companies will not be dissolved, he said.
"The government will not order any company to share its gateway facilities but will ask for voluntary access to the gateway," Mr Uttama said.
The ICT Ministry is now studying all related factors before implementing the plan. However, it did not set a time frame for when the single gateway would be implemented.