How to pass result of foreach loop to functinon LatLng?

How to pass result of foreach loop to functinon LatLng using angular 7 ?

this.partDetailsService.getLocationData(locationArr).subscribe(res => {
console.log(res);
res.forEach((item, index) => {
var dataLocation = res[index]['_source']['GPS1'];
console.log(dataLocation);
var locationsLatLng = dataLocation.split(',');
console.log(locationsLatLng);
});

I have foreach loop get GPS1 latitude and longitude from service return latitude and longitude based on array of locationsId then store it separated by comma , on variable locationsLatLng (lat,lng) as following :

52,70

30,40

20,60

50,100

I need to pass locationsLatLng to function latlng

const coordinates = new google.maps.LatLng(lat value, lng value);