It's just about 9 mins on normal traffic.
Depending on traffic it's around 10 to 20 minutes by taxi but bearing in mind this is Manila it can take longer if rush hour.
Of course one avoids rush hour traffic so it's about ten minutes and 70 pesos otherwise it's hours and 200 pesoes
It was about 200 Pesos in a cab to go to Green Hills in traffic it is only about 6 kilometres but the traffic can be horrendous in Makati. I presume you mean Green Hills, San Juan area we got a taxi in the middle of the day and only took less than 20 minutes. One taxi tried to take us the longer way but I had googled the quickest way and wrote it down he was not happy at 150 Pesos to 200 should be maximum. But I like Guijo there is a Shopwise around the corner and not far up to SM Jazz.
Get an answer from Guijo Suites Makati staff and past guests.