How to make routes for this URL?

GET /bids?countries=us,uk&categories=finance,sports&channels=ca,ga

And the expected response is:

{
  "bids": [
    { 'country': 'us', 'category': 'finance', 'channel': 'ca', 'amount': 4.0 },
    { 'country': 'us', 'category': 'finance', 'channel': '2ga', 'amount': 2.0 },
    { 'country': 'us', 'category': 'sports', 'channel': 'ca', 'amount': 2.0 },
    { 'country': 'us', 'category': 'sports', 'channel': 'ga', 'amount': 2.0 },
    { 'country': 'uk', 'category': 'finance', 'channel': 'ca', 'amount': 1.0 },
    { 'country': 'uk', 'category': 'finance', 'channel': 'ga', 'amount': 1.0 },
    { 'country': 'uk', 'category': 'sports', 'channel': 'ca', 'amount': 3.0 },
    { 'country': 'uk', 'category': 'sports', 'channel': 'ga', 'amount': 3.0 }
  ]
}

How to make routes for this url please help me out - any more experienced people know what I am doing for making routes ?. thanks in advance.